(Chapter 7 of the textbook).

(Note: the videos listed below are hosted on my YouTube channel).

The Fourier Domain (video 8:57)

The Fourier Series (video 10:17)

The FourierTransform (video 17:15)

The Fourier Transform in ImageJ (video 17:23)

Fourier Filtering, part I (video 7:49)

Fourier Filtering, Part II (video 15:16)

Aliasing, Part I (video 6:38)

Aliasing, Part II (video 7:53)